Ornamental stitch attachment for sewing-machines



V. J. SIGODA Aug. 6, 1935.

ENT FOR SEWING MACHINES Filed Oct. 22, 1929 ORNAMENTAL STITCH ATTACHM 3 Sheets-Sheet l INVENT'OR l Eczw I Z 010 BY 8 M ATTORNEY.

V. J. SIGODA Aug. 6, 1935.

ORNAMENTAL STITCH ATTACHMENT FOR SEWING MACHINES Filed Oct. 22, 1929 5 Sheets-Sheet 2 M y w 5 Z I w nllv lmm,

ATTORN EY 1935. v. J. lom 2,010,648

ORNAMENTAL STITCH ATTACHMENT FOR SEWING MACHINES I Zia 7 Filed Oct. 22, 1929 s Shets-Sheet 3 INVE TOR Patented Aug. 6, 1935 UNITED STATES PATENT OFFICE ORNAMENTAL STITCH ATTACHMENT FOR SEWING-MACHINES Victor J. Sigoda, New York, N. Y.

Application October 22,

8 Claims.

This invention relates to sewing machines, and is illustrated, by way of example, as embodied in a Singer sewing machine of awell-known kind whereby lock stitches are produced.

An object of the invention is the provision of improved mechanism; Ior doing ornamental stitching in conjunction with the production of lock stitching, or any kind or style of stitching with which an ornamental effect may beobtained.

Another objector the invention is the provision of an attachment of improved construction for producing ornamental stitching and securing the stitches thereof by the stitches produced by the machine to which the attachment is applied.

A further object of the invention is the pro vision of a mechanism of the character described for doing ornamental work with threads consisting wholly or partially of cotton, wool, silk,

* tinsel or other suitable material.

The invention has for a still further object the provision of a construction inwhich the needle is mounted and operated to move in line with the direction of the movement of the material being sewed and furnishes loops in positions where theywill be engaged and secured by the sewing needle in the process of the usual sewing operation. v

' My invention also relates to a construction having means whereby the ornamental stitching mechanism may, at will, be put into or out of operation during the operation of the sewing machine.

Other objects and advantages of my invention will appear hereinafter.

The invention consists in the improved mechanism for doing ornamental work, and in the form, construction and relative arrangement or arrangements of parts, as will be hereinafter 3i described and subsequently incorporatedin the subjoined claims.

The invention will be best understood by referring to the accompanying drawings which form a material part of thisappIication, and in which Figure 1 represents a rear elevational view of a sewing machine fitted with my improvements and partly in section;

Fig. 2 is an underneath shown in Fig. 1;

Fig. 3 is a detail sectional view line 3- 3 of Fig. 1';

Fig. is a similar view, taken on the line 4-- of Fig. 1; o I o Fig. 5 is a fragmentary elevation, showing the plan view of the parts taken on the 1929, Serial No. 401,427

controlling device whereby the ornamental stitching mechanism is disconnected from the cam drive;

Fig. 6 is a right hand end elevation of the two part presser foot construction;

Fig. 7 is a top view and section of the presser foot construction in connection with the needle for producing the ornamental stitching;

Figs. 8, 9 and 10 are detail perspective views, showing progressive positions of the cooperating needles; and

Figs. 11 and 12 are top and underneath plan views, respectively, of a fragment of goods, showing the ornamental stitching produced by' my improved mechanism. Referring in detail to the accompanying drawings, and first to Figs. 1 and 2, l5 designates the bed plate, It the overhanging arm, I! the sewing needle, l8 the driving wheel, IS a rotary shaft constituting part of .the driven transmission, the feed driving rock shaft, and 2| the hook driving shaft having a sewing hook 2|, all of these parts being of the usual construction and operated in the customary way.

My invention, in its preferred form of construction as illustrated in the drawings, comprises a holder 22 for an auxiliary needle 23 adapted to employ an. ornamental thread wherewith'to embellish the material being sewed. The ornamental thread may consist wholly or partly of cotton, wool, silk, or tinsel. The holder 22 is formed with an upwardly andinwardly curved portion 24 in which the needle 23 is removably secured. With the holder 24 is formed an intermediate transversely extending axis part 25 which is mounted by means of trunnions or pivot pins 26 between the depending arms '21 provided on a tubular member 28, herein shown as turnably fitted on the vertical post29 between the upper and lower collars 30'and 3i. Said post 29 com prises a vertical axis for the horizontal oscilla-' tion of the tubular member 28, arms 21 and holder 22, and its upper end is secured at 33 in the bed plate l5. o

With the transverse axis portion 25 of the holder is formed an arm 34 which curves upwardly and inwardly as best shown in Fig. 1. Connected to the end of the arm 34 by a suitable ball and socket joint 35 is a connecting rod 36, the opposite end of which is connected in turn through a ball and socket joint 3'! with one arm 33 of a bell crank lever indicated generically at 39. Said bell cra-nk lever has a hub portion which is mounted for turning and axially sliding movement upon a pin 4| secured in the framing 52 of the machine. The opposite arm 43 of the bell crank lever carries a follower device in the form of a pin 44 carrying a roller 45 engaging in a cam groove 4% cut in the face of the gear wheel 4?. A gear wheel d8, which drives the gear wheel 5?, receives its power from a pinion 39 fixed upon the driven shaft l9. By this construction and arrangement, when the sewing machine is operated so as to reciprocate the sewing needle ll in the usual way, power is taken from the driven shaft l5 forthe purpose of rocking the holder 22 upon its transverse axis. When the follower engages the cam groove portion 5Q, the holder is rocked in a direction to pass the needle 23 through the material and toward the sewing needle l'l and at an angle with respect thereto. Now the needle 23 carries the ornamental thread 52 through the material being sewed and in such manner that on the return stroke of the needle 23 a loop 53 (see Figs. 8 and 9) is produced in a position where the sewing needle ll, as it descends, will enter the loop' 53 and thereupon secure it fiat upon the material 5! and under the line of stitching 54.

To facilitate the entrance of the sewing needle ll into the loop 53 and to guard positively against the possibility of the loop thread becoming interposed between the point of the needle ii and the needle 23, the last-named needle is formed with a head portion 55 and a throat 55 adjacent thereto. The sewing needle l? is preferably tapered at 5? to a point, the taperingbeing, as clearly shown in Fig. 9,'on the side opposite to that which comes i'n close proximity to the needle 23. By the provision of the throat 56 a space is provided inside the loop 53, and into this space the tapering end 5? of the needle ll enters, so that the loop 53 is engaged by the tapering side of the needle ll underneath the needle thread 5?. 'In this way, as the cooperating needles descend, the loop 53 isengaged by or transferred to the sewing needle so that during the regular sewing ope-ration and in connection withthe lateral stitching mo ement of the needle ll to produce the zigzag line of stitching E l, the loop is will be secured flat upon the face of the material 5i, underneath the line of stitching 54 and about the point 58 where the bobbin thread joins the line of stitching; Itwill of course be realized by those skilled in the art and familiar with the Singer lock stitch sewing machine that the stitch forming mechanism also includes in cooperation with the upper needle i! an under stitch formmg, mechanism or sewing hook it by means of which to lock stitch in the conventional way the bobbin thread with the stitching 54.

the holder .22 is rocked upon its horizontal axis, it is also given a continuous lateral oscillating movement about the axisof the vertical post 25;. Thepurpose of this additional movement is to cause the needle to move in the same direction as the movement of the material 5i so that the needle 23 will not retard or hold back the material l as it is being sewed in the customary way. The power for effecting the oscil- 7 lating movementof the holder and needle is taken from. the feed driving rock shaft 25!. The con nesting transmission means to this end comprises a collar 59 secured to said rock shaft 2% and a connecting arm Ed which is. connected at one end by'a ball and socket joint M with the collar 59,

and at the other end bya ball and socket joint 62 with the end ofa connecting rod 63. The opposite end of the connecting rod 63 is secured by a band 64 to the tubular portion 28, this arrangement being such that the arms 2? and consequently the holder 22 will be oscillated laterally from the rocking movements of the feed driving rock shaft it Under this arrangement, under which the needle is caused to move in line with the movement of the material, the withdrawing action of the needle 23 takes place through the material being sewed at substantially the same place where it entered such material, as shown at 65 in Figs. 11 and 12. In this way, as the needle 23 penetrates the material being sewed so as to carry its loop to the sewing needle lll the said needle 23 advances in line with the material and returns substantially at the place of penetration, leaving behind upon the sewing needle the loop 53 which is secured flat upon the material. Manifestly, the number of loops that may be produced upon the material during the sewing thereof depends upon the ratio of the gear wheels included in the transmission and operated from the driven shaft it.

According to a feature of my present invention, provision is made whereby, at will, the follower may be withdrawn from the cam groove during the customary operation of the machine. In the present embodiment, this result is obtained by means of a pull shaft 85 mounted for longitudinal sliding movement in a bearing device 61 and'carrying at the outer side of the framing L22 a cross pin $23. A head piece '59 associated with the bearing device E? at the outer end thereof is provided at its outer end with a pair of intersecting slots iii and 'H adapted to receive the cross pin 68. At its inner end. the pull shaft 65 turns in a head l2 provided with an arm "at slidably fitting upon the pin 4i between the bell crank hub 46 and a collar it. Imprisoned between the collar M and the framing is a coiled spring it which normally urges the bell crank lever into that position where the follower will engage in the cam groove and where the cross pin 58 will occupy a position in the bottom of the slot iii. Now the other slot ii is of less depth than the slot l8, so that when the pull shaft 68 is drawn outwardly and the cross pin engaged in the shallow slot H, the follower will be maintained out of engagement with the cam groove. This operation does not interfere in any way with the operation of the sewing machine or with the continuous lateral oscillation of the holder. V

In carrying out my invention, it is of course necessary to make provision for sewing materials which differ in thickness. It is also necessary to carry out such provision in a manner that will avoid any likelihood of bending the needle 23, which, as has been previously observed, is given two movements, one upwardly through the material being sewed toward the sewing needle and at an angle thereto, and the other a lateral movement in line with the movement of the material. To this end I may provide two cooperating presser foot plates iii and H, the plate Tl being arranged to make pressure upon material considerably thicker than the material iii. The shanks l8 and 19 of the Presser foot plates 16 and Ti, are adjustable respectively, in the holders and BI, associated with the bar 32 carrying the usual bar spring 83. Adjustment of the shank it is effected by manipulatingthe set screws 83, while the holder 85 is provided with a set screw 86 for securing the shank 79 in the adjusted position desired. A strikepin 85, secured in the holder 8!] at the adjusted position desired and by means of set screws 85, is

adapted, as. the spring 33 is subjected to oom: pression due tozpressural-contaot of the plate 16 with the .work, to engage thesetscrew whereby the .plate .1 1. .will be resiliently i forced upon the work-with. the result that the twoplateszlfi'and 11 will exert substantially even pressure-- upon the materials to be stitched. The presser' ioot plate leisprovided with aslot or ope'ningiB'i for the movement 'of'the needle 23 therethroughflon its upward stroke, the needle 23 passes through the forward end portion-of the slot '8'! as shown in Fig. 8, whereas on'its withdrawing movement ther'said needle 23 passes through therear end portion of said slot'as illustrated in Fig-a9. owing to -theprovisiori of two pressenfoot devices, sep arately adjustable, the'presser foot plate 16 may be so adjusted that the slot or opening '81 will provide for the movements-of the needle 23 with out any danger of bending thelatter, irrespective ot 'any' difierences-in the thickness of -materials placed under the presser foot plates-16 and 11', Associated with-the 'presser' foot plate l! is a guide-88 having a down turned portion- 8! for guiding the edge 90hr thematerial 5IWhere another piece of material (not shown) which "is to be sewed tothe material 5|, is to pass underneath the presser foot plate-l1; the guide 88 is reversed so that the portion 89 thereof projects upwardl'y' while the opposite end portion 9| works on top of the material instead of along the edge.

Suitable provision may be made to prevent axial movement of the bell crank hub 40 for engaging the follower with, or disengaging it from,'the cam groove when the needle holder 22 is at a position other than its low terminal of movement or approximately so, that is to say, when the needle 23 is at a. position other than a retracted position .below the material being sewed. In the present exemplification the means to this end is shown in Fig. 2 as comprising a strike piece 9i attached at one end by screws 92 to the bed plate and provided at its opposite free end with an open notch 93. The bell crank arm 38 cooperates with this open notch and the character of the cooperation is such that it can operate freely in the open notch when the follower is engaged in the cam groove and can clear the end of the strike piece 9| only when the needle 23 is at its lower terminal of movement. When it is attempted to move the bell crank hub axially, either to apply or withdraw the follower, with the needle 23 at any position other than its low terminal of movement, such attempt will be frustrated since the arm 38 will slidinglyengage the end of the strike piece. By this arrangement the vertical rocking movement of the needle 23 about its horizontal axis cannot be started or ended while the needleis engaged with the material being sewed. The sewing machine can, therefore, be operated either with or without my ornamental stitch attachment.

' From the foregoing description, taken in connection with the accompanying drawings, it will be manifest that I have disclosed an extremely simple attachment for producing ornamental stitches in connection with the sewing of materials in the regular way, and one which embodies the several features of advantage enumerated in the statement of invention. While I have, in the present instance, shown and described a preferred embodiment of my invention as reduced to practice, it is to be understood that the construction is susceptible of modification in various particulars without departing from the spirit or'scopeoLmy invention: or sacrificing any of itsiadvantagespm I.

1 .1.1i"I' hecombination in a sewing machine, con sisting of a part mounted for oscillation bn-its axis andlprovidedwith .apair or arms, a needle holder pivoted between...the. arms forrockihg movement; means for oscillating 1 said part, operativeiineans in"connectionwith'said first means, meanszfor rocking said holder .adaptednto he operatedbyia moving part of the sewing machine, said .lr'older. having an upwardly and inwardly curvedend,:arid a needle held in said endJt'o be moved'inline with: the direction of the movement ofwthe..materialbeing sewed, consequent upon the oscillation of said'holder, and to be. passed through the. material being sewed, consequent uporrthelrockingofthe holder; l I 2.='1'he combination; in a s-sewing machine i or the. character. described,zembodying stitch form ing means including a sewing needle and feeding mechanism for .theinaterial. to I be sewed, oi. an auxiliary loop carrying needleconstructed and -arrangedtoapass through the material being sewed andrto present the loop in a position where it will. be entered by the sewing needle and se curedwith the stitching"produced thereby, means for movingl;the auxiliary needle through the material, operative transmission meansdn comiec tion with said first means, and means operated by the feeding mechanism for oscillating the auxiliary needle in line with the direction of feed of the material being sewed.

3. In a sewing machine, the combination with an auxiliary needle holder pivotally mounted to have rocking movement, of a gear wheel adapted to be rotated by a driving part of the sewing mawheel adapted to be rotated by a driving part of the sewing machine and provided with a cam grooove, a bell crank mounted to have rocking and sliding movement on its axis, a follower on one arm of said bell crank engaging said cam groove, a needle holder mounted to have rocking movement, an operative connection between the opposite arm of the bell crank and said holder whereby to effect rocking action of said holder from the rotation of said wheel, and means for sliding the bell crank on its axis so as to disengagethe follower from said cam groove.

5. A sewing machine having, in combination, stitch forming mechanism including an upper needle reciprocating through the work below it and under stitch forming mechanism to cooper- .ate with it and forming a course of stitching upon the work, an under embroidery needle device reciprocating through the work above it and forming above the same embroidery loops each of which is penetrated by the upper needle and secured in place upon the work by the stitching formed thereon by said upper needle, said device being effective to penetrate the work at points spaced laterally a distance from the course of stitching and to move above the work from such points to deliver to the upper needle the loops which are to be secured by the stitching when the stitching is secured by the under stitch forming 45 4. In a sewing machine, the combination of a,

mechanism, whereby to position .upon the work embroidery loops lateral to the course of stitching and between the securing stitching and points of penetration made through the work by said .device.

6. A sewing machine having, in combination, stitch forming mechanism including an upper needle reciprocating through the work below it andrunder stitch forming mechanism to cooperate with it and establishing stitching upon the work, an under embroidery needle device reciprocating through the work above it and cooperating with the upper needle at an angle to form embroidery loops upon the top of the work, extending from the stitching to a point laterally thereof, the upper needle being effective with respect to the lower needle to penetrate through each embroidery loop to secure the same at one end by the stitching while the lower needlefsecures the opposite portion of the loop at its laterally distant point by carrying it through the work tothe lower side thereof.

7. A sewing machine having, in combination, stitch forming mechanism including an upper needle which reciprocates through the work below it and under stitch forming mechanism to cooperate with it to produce upon the work a suc cession of stitches, an under embroidery needle device reciprocating through the work above it and cooperating with the upper needle at an angle to form upon the top of the work a fiat lateral embroidery loop penetrated at least by one of the stitches, and means for operating said device in timed cooperation with the upper needle to produce only one embroidery loop. to a plurality of stitches.

8.'In a sewing machine, the combination of stitch forming mechanism including an upper needle, under stitch forming mechanism, means for operating the first-named stitch forming mechanism to reciprocate the needle through the work below it, means for operating the under stitch forming mechanism to cooperate with the upper needle in making the stitches, means for forming embroidery loops to be secured by the stitches being formed'and to extend upon the work laterally therefrom, comprising an under reciprocating needle operative to penetrate the work a spaced distance laterally of the stitches and having movement to the upper needle to form embroidery loops thereon, and means for operating said under needle in timed. ratio to the upper needle and under stitch forming mechanism to produce spaced lateral loops connected at one end to the formed stitches and passing through the work at the other end.

VICTOR J. SIGODA. 

